{
  "manageEntity": {
    "action": "Save",
    "entityId": "626051164",
    "entityType": "Track",
    "nonce": "0x1cb0df72dfe1913319197ebde894466cb4cf56f02548a2189ea59a7b4e985f21",
    "signature": "0xc5adb019ceaf36a9721c079d71387213645690823aa3df7d40f9388a23f0248e528545d1cec4f27701d3d3c90cd90208d96799ac548ed303558eea70d869994a1c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}